Lubricant fitting



Jn. l, 1929. 1,697,217

o. Ly. ZERK LUBRICANT 'FITTING Filed April 19, 1924 SCQJ ZZ. vZer. a@

Patented Jan. 1, 1929.

UiE STTES 1,697,217 PATENT ortica.'

OSCAR U. ZEBK, OF CLEVELAND, OHIO, ASSIGNOR TO ALEMITE :MANUFACTURING COR- PORATION, 0F CHICAGO, ILLINOIS, A CORPORATION 0F DELAWARE.

LUBRICANT FITTING.

Application led April 19, 1924. `Steria] No. 707,699.'

My invention relates to improvements in lubricating fittings, and is particularly concerned with a novel type of fitting, forming a part of a lubricating system comprising a plurality of such fittings and a lubricant compressor for supplying lubricant under pressure to the iittings,r the compressor embodying some means for making sealed contact with the fitting so that lubricant under pressure can be transmitted from the compressor to the ttings. i

One of the objects of my invention is to provide a fitting, forming part of a lubrieating system such as described above, and particularly adapted to be used with a compressor having a coupling device which includes a gasket, or sealing member, that is subjected to the pressure of the lubricant in such manner that the sealing effect increases with increase in pressure on the lubricant.

In my present invention the sealing con.

tact is formed between the fitting and gasket, or sealing member, along a comparatively narrow annular band, adjacent the edge of the outer end of the fitting, so that thel ressure per unit area on the contacting sur aces of the fitting and the gasket, or sealing member, is greater than would be the case if the gasket or sealing member contacted with.

substantially the entire outer end of the fitting. l

Another object of my invention is to provide a fitting which is constructed so that it is easier to clean the contacting portion of the fitting than is the case with that type of fitting which has a comparatively flat end.

With the. fitting described herein it is necessary to clean only the extreme marginal portion of the contacting end of the fitting, and, if by accident, dirt is not removed from the remaining portions of the contacting end,

it will not interfere with the sealed contact between the fitting and the gasket, or sealing member, referred to above.

A still further object of my invention is to provide a fitting forming a part of a system in which the seal between the fitting and the compressor discharge device is formed by two contacting metal'surfaces, the arrangement being such that a complete seal is effected even though the fitting is appreached from different angles relative to the tting. l

Other objects of my invention are to provide a fitting of the` above character which is simple of construction, rugged and economical to manufacture. i

Other objects of my invention will appear as this description progresses, reference being had to the accompanying drawings in whicha tubular member 5, which is preferably made o f brass, but which can be ina-de of any desired metal, having screw threads 6, or other suitable means at one end, by which the fitting can be secured tothe bearing to be lubricated. At its other end the tubular member is provided with inwardly extending annular flanges forming' the port 8 for the passage of lubricant. The flange is beveled inwardly on both sides as shown in Fig. 1 .to form outer and inner seats 9 and 10, respectively. The outer seat is surrounded by a narrow, annular contact surface 11, the purpose of which will be referred to later on. l

A ball closure 12 iS provided for the port 8, and is yieldingly held in position by means of the 'compression spring 13, which is confined between the ball closure 12 andthe intermediate portion of thepin 14, which extends -through and beyond both sides of the tubular member 5.

When my improved fitting is used with that type of lubricant compressor, which is of well known construction, and'which comprises a coupling member formed in part of a sleeve 15, having bayonet slots 16 formed at its outer end, and having a cup leather or sealing device 17, slidable therein and yieldingly urged outwardly by means of a compression spring 18 bearing a ainsta washer 19 contacting with the cup eather or sealing device as shown in Figurel 1, the principal contact with the sealing device, or cup leather, takes place along a narrow annular band o r surface adjacent the edge of the outer end of the fitting, whereas the central portion of the cup leather, or sealing device, contacts more or less loosely7 with the central portion of the outer end of the fitting.

From the above description it will be apparent that any pressure, exerted by the lubricants or the compression spring 18, upon the cup leather, or sealing device, will be exerted upon a comparatively small area of the annular contact band or surface surrounding the outer end of the fitting, sok that the pressure, per unit area, exerted uppn the contacting surfaces of the fitting ahd the sealing member, will be greater than would be the case if these two members contacted throughout their opposing surfaces. It will also be apparent that even though dust or dirt may lodge on the portions of the outer ends of the fitting, immediately adjacent the port 8, such dirt or dust will not-seriously interfere with the sealing action between the gasket and the fitting, nor will it be conveyed into the bearing, because it is not in the path of the moving lubricant.

With the fitting such as described all that isnecessa to do, before connecting a coupling mem er such as described, with it, is to clean the portion of the fitting. immediately adjacent t e port 8, and the exposed portion ofthe closure l2, and, in addition, anarrow annular contact surface at the outer edge of the end of the fitting. This can be easily'and quickly done with any suitable brush or cloth.

My improved fitting can also be used with a compressor having a discharge portion or nozzle similar to that illustrated in Fig. 2, in which the extreme outer end 2O of the nozzle, or discharge device 21, is spherical in contour, so that it will contact with the depressed conical Surface at the outer end of the fitting along a. circle. It-will a'lso be apparent that the nozzle or discharge device 21 can occupy different angles relative to the fitting, without destroying lthe sealingv contact between its spherical surface 20, and the depressed conical surface of the fitting. This is of importance as it enables the operator to approachl the fittings from various angles and thus makes it possible for the operator to .reach bearin s or fittings located at more or less inaccessi le positions.

The angles defining' he outer and inner faces 9 and 10, respectively, are each approximately 120 degrees. This angle is the preferred one but it will of course be understood that it can be-varied without departing from the spirit of my invention. It should be noted that the fiange 7 increases in thickness toward t-he outer edge. This'is of particular value where nozzlessuch as 21 are used, cause nozzles ofthis type are almost universallynsed with compressors constructed in such manner that the pressure on the lubricant is developed by pushing upon the compressor, or a portion, thereof, in the direction ofthe fittin This, of course, means that the annular ange 7, when such a compressor is used, must bear the entire force exerted upon the compressor. By making the fiange 7 taper outwardly, as shown in' the drawings, its strength is materially increased, so that it is strong enough to bear any l ressure that may be exerted thereupon wit out material, or substantial, deflection and with no deformation.

While I have described the details of construction of the preferred embodiment of i my invention, it is to be clearl understood that my invention is not limite to these details, but is capable of other adaptations and modifications within the scope of the appended claim.

I- claim:

In a lubricating apparatus of the class described a lubricant receiving nipple comprising a tubular body having an outlet and prov1 ed with means for securing said body to a part to be lubricated, and an inlet end adapted to form a lubricant-tight connection with the discharge nozzles of high pressure lubricant com ressors, said inlet end having a peripheral at portion adapted 4to form a seal with one type of discharge nozzle, and a central conical ortion adapted tol forma seal with a secon type of discharge nozzle by contact therewith along the conical sur- `face of the fitting between `the bore and pe riphery thereof, a pin extending throu h said tubular bod and projecting from bot sides thereof, an a check valvein said tubular body and normally closing the inlet thereof.

In testimony whereof I have hereunto signed my name this 1st da of April, 1924.

OSC R U. ZERK. 

